Breast pump



FIG. 1 is a front perspective view of a breast pump showing our new design;

FIG. 2 is a top view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a left side view thereof;

FIG. 6 is a front view thereof; and,

FIG. 7 is a rear view thereof.

The dash-dash broken lines in the drawings depict portions of the breast pump that form no part of the claimed design. The dot-dash broken lines depict boundaries of the claimed design and form no part thereof. 

CLAIM The ornamental design for a breast pump, as shown and described. 